"Error: Error watching file for changes: EMFILE" when launching tests with "npm test"

[juanmaguitar]

Issue description

• components: all
• reactstrap version 6.1.0
• MacOs 10.13.3
• Node: 8.11.1
• NPM: 3.10.10

What is happening?

⬢  reactstrap  master ⦿ npm test

> reactstrap@6.1.0 test /PROJECTS/reactstrap
> cross-env BABEL_ENV=test react-scripts test --env=jsdom

2018-06-15 20:37 node[61784] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
2018-06-15 20:37 node[61784] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
2018-06-15 20:37 node[61784] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
events.js:183
      throw er; // Unhandled 'error' event
      ^

Error: Error watching file for changes: EMFILE
    at _errnoException (util.js:1022:11)
    at FSEvent.FSWatcher._handle.onchange (fs.js:1359:9)

What should be happening?

It should launch the tests properly

Steps to reproduce issue

1. clone the repo
2. install the dependencies with npm install
3. launch the tests with npm test

References

• Error: Error watching file for changes: EMFILE jestjs/jest#3436
• https://stackoverflow.com/questions/41657754/testing-with-jest-failed-with-error-error-watching-file-for-changes-emfile#41661452

[juanmaguitar]

It seems to be something related to the version of watchman used by jest. As many people in this issue doing brew install watchman solved this for me.

I don't know if there's some more generic solution that should be adopted by reactstrap to prevent this error

[TheSharpieOne]

You can run coverage to tell it not to watch and thus not to use watchman. This is what I have to do on some of the computers I use with less privileges.

[juanmaguitar]

Oks, I close this issue then as there is no much else to be done here